GM TH700R4 & Later 4L60/65/70E Transmissions

TH700R4, 4L60E, 4L65E, 4L70E Transmission Specs & Ratios

The TH700R4 was introduced to replace the TH350 for the 1982 model year. An increase in demand for fuel efficient vehicles directed General Motors to retire their light duty 3 speed in favor of an overdrive 4 speed unit. The transmission was a perfect compliment to the company's fuel sipping 6.2L diesel, which debuted the same year. It took GM a few years to get the initial kinks worked out of the transmission, and the general consensus is that the post 1987 transmissions were the most reliable. In 1990, the transmission was renamed the "4L60", which stood for 4 speed, longitudinally mounted, and a strength designation of 60 (some believe the 60 refers to a maximum GVWR of 6,000 lbs, but the transmission has been used in applications rated up to 8,600 lbs). In 1993, the transmission was converted to electronic controls. Subsequent versions of varying strength followed; 4L60E, 4L65E, and 4L70E.

TH700R4, 4L60/65/70E Ratios

1st

2nd

3rd

4th

R

3.059 : 1

1.625 : 1

1.00 : 1

0.696 : 1

2.294 : 1

 

TH700R4, 4L60/65/70E Specs

Transmission:

General Motors TH700R4, 4L60E, 4L65E, 4L70E

Type:

4 speed automatic overdrive transmission

Predecessor:

TH350

Model Years/Applications:

1982 - 1993 6.2L diesel, 1/2 ton models only

Case Material:

Die cast aluminum

Max Input Torque:

4L60

350 lb-ft

4L65

380 lb-ft

4L70

400 lb-ft

Max GVWR:

8,600 lbs

Max GCWR:

15,500 lbs

Weight:

~200 lbs dry

Fluid Capacity:

8.8 to 11.4 quarts depending on application

ATF Type/Spec:

DEXRON VI automatic transmission fluid

Additional Info:

• 4L60E - RPO code "M30"

• 4L65E - RPO code "M32"

• 4L70E - RPO code "M70"

• Electronic transmission controls introduced for the 1993 MY; electric shift solenoids replaced hydraulic shift logic

• 1997+ MY 4L60/65/70E transmissions feature a different case style than older units, subsequently creating the divide between what is considered an "early style" and "late style" transmission

• The TH700R4 transmission was renamed the 4L60 beginning the 1990 MY